An arc-shaped structure vacuum high and low temperature heat flux simulation system and method

Abstract

The present invention provides an arc-shaped structure vacuum high and low temperature heat flux simulation system and method, which relates to the technical field of environmental simulation. The system includes an arc-shaped infrared lamp group, a mirror heat flux reflector, a support frame, a low-temperature rotating mechanism, a temperature acquisition probe, and a temperature control computer. A plurality of arc-shaped infrared lamp groups are installed on the mirror heat flux reflector. The arc-shaped infrared lamp group includes a lamp tube and an insulating buckle. The insulating buckle is fixedly connected to the mirror heat flux reflector. The bending direction of the lamp tube is the same as the radian of the arc-shaped structure. The support frame is in a frame structure. A plurality of low-temperature rotating mechanisms are fixedly installed on the support frame. The low-temperature rotating mechanisms are arranged in a plane parallel to the arc-shaped structure surface. The temperature acquisition probe is arranged on the arc-shaped structure. The temperature control computer is connected to the temperature acquisition probe and the arc-shaped infrared lamp group. The system and method improve the heating temperature uniformity of the arc-shaped structure through the overall structure setting, increase the cooling rate by rotation, and also improve the space utilization efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of spacecraft environment simulation, and in particular to an arc-shaped structure vacuum high-low temperature heat flux simulation system and method. Background Art

[0002] The number of special-shaped structures in spacecraft components is gradually increasing. Usually, a thermal vacuum test needs to be completed before general assembly to expose potential defects in materials and processes, eliminate early failures of products, and improve reliability. The key to the thermal vacuum test is the cyclic change of high temperature and low temperature in a vacuum environment. In order to truly simulate the on-orbit working state, it is necessary to simulate the on-orbit heating and cooling rates and extreme temperatures as much as possible in the test. Due to its fast heating response, high heat flux density, high cleanliness, etc., an infrared lamp array is often used to simulate heat flux to ensure that the structure can reach the target temperature within the specified time.

[0003] In the prior art, Chinese Patent CN109238763A discloses an infrared lamp array for spacecraft thermal tests with a modular design. A large lamp array consists of multiple interchangeable small modules, and one small module is a lamp array of the smallest unit. Different numbers of lamp arrays are flexibly combined to adapt to the thermal vacuum tests of different-sized solar panels. However, this method is mainly applicable to flat heated products, and for non-planar products such as arc-shaped structures, problems such as poor temperature uniformity and obvious interference in the heating area are likely to occur.

[0004] Chinese Patent CN103538735A discloses a profiled infrared lamp array bracket. The bifurcation points of the six groups of support arms connected movably rotate to adjust the distance between the infrared lamps, and the slider movement of the infrared lamp array body and the support frame realizes the relative position adjustment of the lamp array body and the support frame. However, there is a problem of infrared lamp array structure occlusion during the cooling process, resulting in a slow cooling rate.

[0005] Chinese Patent CN103997801A discloses the application of a shaped heating plate in the thermal vacuum test of a spacecraft antenna. This patent realizes heat flux simulation by making a metal heating plate with the same shape as the heated product, and increases the cooling rate by removing the shaped heating plate during the cooling process. However, the shaped heating plate has poor versatility and is only applicable to products of the same model. The method of removing the shaped heating plate increases the test use space, and the space utilization rate is poor.

[0006] In summary, the existing technologies have problems such as temperature uniformity of arc-shaped structures, low cooling rate, and low space utilization rate, and further improvements need to be made to the existing simulation test equipment. Summary of the Invention

[0007] In order to improve the uniformity of heat reception during the simulation of high and low temperature heat flux in an arc-shaped structure under vacuum, increase the cooling rate, and improve the space utilization rate of the test system, the present invention provides an arc-shaped structure vacuum high and low temperature heat flux simulation system and method. The specific technical solutions are as follows.

[0008] An arc-shaped structure vacuum high and low temperature heat flux simulation system includes an arc-shaped infrared lamp group, a mirror heat flux reflector, a support frame, a low-temperature rotation mechanism, a temperature acquisition probe, and a temperature control computer. A plurality of the arc-shaped infrared lamp groups are installed on the mirror heat flux reflector. The arc-shaped infrared lamp group includes a lamp tube and an insulating buckle. The insulating buckle is fixedly connected to the mirror heat flux reflector. The bending direction of the lamp tube is the same as the radian of the arc-shaped structure. The support frame is a frame structure. A plurality of the low-temperature rotation mechanisms are fixedly installed on the support frame. The low-temperature rotation mechanism and the installation support rod are arranged in a plane parallel to the arc-shaped structure. The temperature control computer is connected to the temperature acquisition probe and the arc-shaped infrared lamp group.

[0009] Preferably, the arc-shaped structure is the structure to be tested. The arc-shaped structure is placed inside the support frame. A plurality of temperature acquisition probes are evenly arranged on the arc-shaped structure.

[0010] Preferably, the low-temperature rotation mechanism is arranged at both ends of the lamp group installation support rod. The low-temperature rotation mechanism controls the installation support rod to rotate 360° along the axis. The mirror heat flux reflector is fixedly connected to the installation support rod through a connecting rod.

[0011] More preferably, the length of the connecting rod is less than the distance between adjacent two installation support rods.

[0012] More preferably, the temperature control computer controls the heating power of the lamp tube. The connecting rod is detachably connected to the mirror heat flux reflector.

[0013] More preferably, the mirror heat flux reflector has a plane reflection part and a side reflection part. The lamp tube is installed on the plane reflection part and is configured to protrude outward along the perpendicular direction of one side of the installation side.

[0014] More preferably, the low-temperature rotation mechanism adjusts the normal direction of the arc-shaped infrared lamp group facing the temperature acquisition probe on the arc-shaped structure during heating.

[0015] An arc-shaped structure vacuum high and low temperature heat flux simulation method uses the above-mentioned arc-shaped structure vacuum high and low temperature heat flux simulation system, and includes: fixing the arc-shaped structure inside the support frame, installing a temperature acquisition probe on the arc-shaped structure, adjusting the arrangement position of the low-temperature rotation mechanism according to the arc-shaped structure, and the low-temperature rotation mechanism controls the installation support rod to rotate to adjust the position of the arc-shaped infrared lamp group; simulating a vacuum environment to conduct a reliability test on the arc-shaped structure under high and low temperature cyclic changes; after the temperature control computer processes the data collected by the temperature acquisition probe, it feeds back to control the power of the arc-shaped infrared lamp group.

[0016] Further preferably, during the high-temperature and low-temperature cyclic change process: during the heating process, the arc-shaped infrared lamp group and the mirror heat flux reflector are facing the normal direction of the temperature acquisition probe on the arc-shaped structure, and the arc-shaped structure uniformly receives the heat flux; during the cooling process, the low-temperature rotating mechanism rotates to drive the arc-shaped infrared lamp group and the mirror heat flux reflector to rotate by 90°.

[0017] The beneficial effects of an arc-shaped structure vacuum high and low temperature heat flux simulation system and method provided by the present invention are as follows: through the cooperation of the arc-shaped infrared lamp group, the mirror heat flux reflector and the low-temperature rotating mechanism in the system, an arc-shaped arrangement is achieved, ensuring that the heated structure can be uniformly heated; in addition, by rotating the low-temperature rotating mechanism, the angles of the arc-shaped infrared lamp assembly and the mirror heat flux reflector can be changed, improving the cooling rate; in addition, the space utilization rate of the simulation test space can be effectively improved, and the test cost can be reduced. Description of the Drawings

[0018] Figure 1 is a schematic structural diagram of an arc-shaped structure vacuum high and low temperature heat flux simulation system;

[0019] Figure 2 is a schematic installation structure diagram of the mirror heat flux reflector;

[0020] Figure 3 is a schematic relative arrangement diagram of the mirror heat flux reflector and the arc-shaped structure during the heating process;

[0021] Figure 4 is a schematic relative arrangement diagram of the mirror heat flux reflector and the arc-shaped structure during the cooling process;

[0022] Figure 5 is a schematic installation structure diagram of the arc-shaped infrared lamp group;

[0023] In the figure: 1 - arc-shaped infrared lamp group; 2 - mirror heat flux reflector; 3 - low-temperature rotating mechanism; 4 - support frame; 5 - temperature acquisition probe; 6 - temperature control computer; 7 - arc-shaped structure; 8 - installation support rod; 9 - lamp tube; 10 - insulating buckle, 11 - connecting rod. Detailed Embodiments

[0024] Combined with Figures 1 to 5 shown, the detailed embodiments of an arc-shaped structure vacuum high and low temperature heat flux simulation system and method provided by the present invention are described.

[0025] An arc-structure vacuum high-low temperature heat flux simulation system includes an arc-shaped infrared lamp group 1, a mirror heat flux reflector 2, a support frame 4, a low-temperature rotation mechanism 3, a temperature acquisition probe 5, and a temperature control computer 6. Among them, the arc-shaped infrared lamp group can adjust the heating power, the mirror heat flux reflector improves the heating efficiency, the support frame and the low-temperature rotation mechanism cooperate to adjust the installation position of the arc-shaped infrared lamp group, the temperature acquisition probe monitors the temperature, and the computer collects and records the monitoring information and controls the heating power. Multiple arc-shaped infrared lamp groups 1 are installed on the mirror heat flux reflector. The arc-shaped infrared lamp group 1 includes a lamp tube 9 and an insulating buckle 10. The lamp tube 9 is fixedly installed on the mirror heat flux reflector through the insulating buckle 10. The insulating buckle 10 is fixedly connected to the mirror heat flux reflector 2, and the bending direction of the lamp tube is the same as the radian of the arc structure. The support frame is a frame structure and is made of prefabricated profile structures. Multiple low-temperature rotation mechanisms 3 are fixedly installed on the support frame. The low-temperature rotation mechanisms 3 and the installation support rod 8 are arranged in a plane parallel to the arc structure, so as to ensure that the matrix plane structure composed of each arc-shaped infrared lamp group 1 is parallel to the arc structure plane, and the heat flux is uniform when the distances are the same. The temperature control computer is connected to the temperature acquisition probe 5 and the arc-shaped infrared lamp group 1.

[0026] Among them, the arc structure 7 is the structure to be tested, and the size of the heated arc structure is the same as that of the spacecraft structure. The arc structure is placed inside the support frame and can be fixed to the support frame through connecting components or tooling. Multiple temperature acquisition probes 5 are evenly arranged on the arc structure to detect the temperature changes at different positions on the arc structure.

[0027] The low-temperature rotation mechanisms 3 are arranged at both ends of the lamp group installation support rod. The low-temperature rotation mechanisms 3 control the installation support rod to rotate 360° along the axis. The low-temperature rotation mechanisms 3 can complete rotation in a high-temperature or low-temperature vacuum environment and can adjust the rotation position of the lamp group installation support rod. The mirror heat flux reflector 2 is fixedly connected to the installation support rod 8 through a connecting rod. The connecting rod leaves a certain space between the mirror heat flux reflector and the installation support rod to maintain the relative positions of each infrared lamp component and the distance from the heated arc structure. Among them, the length of the connecting rod is less than the distance between adjacent two installation support rods, so as to ensure rapid heat dissipation when rotating 90°.

[0028] The temperature control computer 6 controls and adjusts the heating power of the lamp tube, so as to realize the control of the heating rate and the maximum temperature; the connecting rod 11 is detachably connected to the mirror heat flux reflector 2, so as to facilitate the installation of the mirror heat flux reflector and perform fine adjustment to ensure that it generates heat in the same plane.

[0029] The mirror surface heat flow reflector 2 has a planar reflection part and a side reflection part. The reflection part and the side reflection part enclose a reflection space, which evenly reflects the heat flow of the arc-shaped infrared lamp group to the surface of the arc-shaped structure. The array structure formed by the mirror surface heat flow reflector 2 is parallel to the plane of the arc-shaped structure. At the same distance, the heat received by the surface of the arc-shaped structure 7 is uniform. The lamp tube 9 is installed on the planar reflection part, fixedly installed in the middle of the planar reflection part, and the lamp tube 9 is configured to protrude outward along the perpendicular direction of the side where it is installed. The lamp tube 9 is fixed to the mirror surface heat flow reflector approximately parallelly through an insulating buckle. Among them, the distance between the middle part of the lamp tube 9 and the mirror surface heat flow reflector is the largest, and this distance gradually decreases from the middle part of the lamp tube 9 to both ends of the lamp tube. The low-temperature rotation mechanism 3 adjusts the normal direction of the arc-shaped infrared lamp group facing the temperature acquisition probe on the arc-shaped structure during heating, so that the temperature can be detected more accurately.

[0030] A method for simulating the high and low temperature heat flow in a vacuum for an arc-shaped structure, using the above-mentioned system for simulating the high and low temperature heat flow in a vacuum for an arc-shaped structure. The simulation process includes: fixing the arc-shaped structure in the support frame, installing a temperature acquisition probe on the arc-shaped structure, adjusting the arrangement position of the low-temperature rotation mechanism according to the arc-shaped structure, and the low-temperature rotation mechanism controls the rotation of the mounting bracket rod to adjust the position of the arc-shaped infrared lamp group; simulating a vacuum environment and operating in the vacuum environment to conduct reliability tests on the arc-shaped structure under high and low temperature cyclic changes; after the measurement and control temperature computer processes the data collected by the temperature acquisition probe, it feedback-controls the power of the arc-shaped infrared lamp group. Among them, during the high and low temperature cyclic change process: during the heating process, the arc-shaped infrared lamp group and the mirror surface heat flow reflector face the normal direction of the temperature acquisition probe on the arc-shaped structure, and the arc-shaped structure evenly receives the heat flow; during the cooling process, the low-temperature rotation mechanism rotates to drive the arc-shaped infrared lamp group and the mirror surface heat flow reflector to rotate 90°.

[0031] In this system, through the cooperation of the arc-shaped infrared lamp group, the mirror surface heat flow reflector and the low-temperature rotation mechanism, an arc-shaped arrangement is achieved, ensuring that the heated structure can be evenly heated; in addition, by rotating the low-temperature rotation mechanism, the angles of the arc-shaped infrared lamp assembly and the mirror surface heat flow reflector can be changed, improving the cooling rate; in addition, the space utilization rate of the simulation test space can be effectively improved, and the test cost can be reduced.

[0032] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by those skilled in the art within the scope of the essence of the present invention should also fall within the protection scope of the present invention.

Claims

1. An arc-shaped structure vacuum high and low temperature heat flux simulation system, characterized in that It includes an arc infrared lamp group, a mirror heat flux reflector, a support frame, a low-temperature rotation mechanism, a temperature acquisition probe, and a temperature measurement and control computer; a plurality of the arc infrared lamp groups are installed on the mirror heat flux reflector. The arc infrared lamp group includes a lamp tube and an insulating buckle. The insulating buckle is fixedly connected to the mirror heat flux reflector. The bending direction of the lamp tube is the same as the radian of the arc structure. The support frame is a frame structure. A plurality of the low-temperature rotation mechanisms are fixedly installed on the support frame. The low-temperature rotation mechanism and the installation support rod are arranged in a plane parallel to the arc structure; the temperature measurement and control computer is connected to the temperature acquisition probe and the arc infrared lamp group.

2. The arc-shaped structure vacuum high and low temperature heat flux simulation system according to claim 1, characterized in that The arc structure is the structure to be tested. The arc structure is placed inside the support frame. A plurality of temperature acquisition probes are evenly arranged on the arc structure.

3. The arc-shaped structure vacuum high and low temperature heat flux simulation system according to claim 1, characterized in that, The low-temperature rotation mechanism is arranged at both ends of the lamp group installation support rod. The low-temperature rotation mechanism controls the installation support rod to rotate 360° along the axis. The mirror heat flux reflector is fixedly connected to the installation support rod through a connecting rod.

4. An arc-shaped structure vacuum high and low temperature heat flux simulation system according to claim 3, characterized in that The length of the connecting rod is less than the distance between adjacent two installation support rods.

5. An arc-shaped structure vacuum high and low temperature heat flux simulation system according to claim 3, characterized in that, The temperature measurement and control computer controls the heating power of the lamp tube. The connecting rod is detachably connected to the mirror heat flux reflector.

6. The arc-shaped structure vacuum high and low temperature heat flux simulation system according to claim 1, characterized in that, The mirror heat flux reflector has a plane reflection part and a side reflection part. The lamp tube is installed on the plane reflection part and is configured to protrude outward along the perpendicular direction of the side on the installation side.

7. An arc-shaped structure vacuum high and low temperature heat flux simulation system according to claim 1, characterized in that The low-temperature rotation mechanism adjusts the normal direction of the arc infrared lamp group facing the temperature acquisition probe on the arc structure during heating.

8. A method for simulating arc-shaped structure vacuum high and low temperature heat flux, which uses an arc-shaped structure vacuum high and low temperature heat flux simulation system according to any one of claims 1 to 7, characterized in that, It includes: Fix the arc structure inside the support frame, install temperature acquisition probes on the arc structure, adjust the layout position of the low-temperature rotation mechanism according to the arc structure, and the low-temperature rotation mechanism controls the installation support rod to rotate to adjust the position of the arc infrared lamp group; simulate a vacuum environment and conduct a reliability test on the arc structure under high and low temperature cyclic changes; after the temperature measurement and control computer processes the data collected by the temperature acquisition probe, it feeds back to control the power of the arc infrared lamp group.

9. A method for simulating high and low temperature heat flux of an arc-shaped structure in vacuum according to claim 8, characterized in that During the high and low temperature cyclic change process: during the heating process, the arc infrared lamp group and the mirror heat flux reflector face the normal direction of the temperature acquisition probe on the arc structure, and the arc structure uniformly receives heat flux; during the cooling process, the low-temperature rotation mechanism rotates to drive the arc infrared lamp group and the mirror heat flux reflector to rotate 90°.

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